Try these as a starting point: - Think Java (programming, foundational; free) https://greenteapress.com/wp/think-java/ https://greenteapress.com/wp/think-java/

Try these as a starting point: - Think Java (programming, foundational; free) https://greenteapress.com/wp/think-java/ https://greenteapress.com/wp/think-java/ - Think Data Structures (programming, foundational; free) https://greenteapress.com/wp/think-data-structures/ https://greenteapress.com/wp/think-data-structures/ - Effective Java (classic) https://www.amazon.co.uk/Effective-Java-Joshua-Bloch/dp/0134685997/ https://www.amazon.co.uk/Effective-Java-Joshua-Bloch/dp/0134... - Java Concurrency in Practice (classic) https://www.amazon.co.uk/Java-Concurrency-Practice-Brian-Goetz/dp/0321349601/r https://www.amazon.co.uk/Java-Concurrency-Practice-Brian-Goe... - Continuous Delivery in Java (essential) https://www.amazon.co.uk/Continuous-Delivery-Java-Daniel-Bryant/dp/1491986026/ https://www.amazon.co.uk/Continuous-Delivery-Java-Daniel-Bry...